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Power Systems

Power Systems
A loss less transmission line has a length of 600 km, find the phase shift of voltage signal?

 36°
 45°
 90°
 42°

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Power Systems
The method of neutral grounding affects the

 negative sequence network
All of these
 positive sequence network
 zero sequence network

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Power Systems
In an induction relay for a particular current setting the operating time 4 sec. When the time multiplier setting is 0.8 if the time multiplier setting is rest to 1 the operating time is

 5.
  un changed.
  1.
 10.

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Power Systems
The use of high speed circuit breakers

 decrease system stability.
 increased the short circuit current.
 reduces the short circuit current.
  improves system stability.

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Power Systems
Rankine cycle efficiency of a steam power plant is of

  30 - 45 %.
  45 - 80 %.
  60 - 80 %.
  20 - 30 %.

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Power Systems
The essential requirement(s) for power plants to be operated as peak load plants are

 Low capital cost.
 Capability of quick starts.
 Quick response to load variation.
All of these

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